Chem: Key Vocabulary Unit 2

Question 1

Atom

Answer 1

fundamental unit in which all matter is composed

Question 2

proton

Answer 2

positively charged particle, 1 AMU, inside nucleus

Question 3

neutron

Answer 3

neutrally charged particle, 1 AMU, inside nucleus

Question 4

electron

Answer 4

negatively charged particle, 0 AMU, outside nucleus

volume / chemical properties

Question 5

nucleus

Answer 5

made up of protons and neutrons, mass of an atom

Question 6

atomic mass

Answer 6

protons + neutrons

Question 7

atomic number

Answer 7

number of protons

in nucleus of an atom

Question 8

nuclear symbol

Answer 8

mass on top, atomic number on bottom, element symbol to the side

Question 9

Isotopes

Answer 9

different versions of an atom

Question 10

electron cloud

Answer 10

place in an atom where electrons are likely to be found 90 percent of the time

Question 11

energy level

Answer 11

place in atom where electron cloud is found

Question 12

bohr diagram

Answer 12

find protons, neutrons, and electrons. Put protons and neutrons in center, make electrons surround it.

Question 13

Ion

Answer 13

atom or molecule with a net electric charge due to the loss or gain of electrons (positively or negatively charged atoms)